\documentclass{article}

\usepackage{ctex}
\usepackage{graphicx}
\graphicspath{{figures/},{pics/}}

\title{插图}
\author{勇}
\date{\today}

\begin{document}
	\maketitle
	
	\LaTeX{}中的插图：
	
	\includegraphics{头像}
	\includegraphics{2018}
	\includegraphics{1}
	
	\includegraphics[scale=0.3]{头像}
	\includegraphics[scale=0.1]{2018}
	\includegraphics[scale=0.1]{1}
	
	\includegraphics[width=3cm]{头像}
	\includegraphics[width=3cm]{2018}
	\includegraphics[width=3cm]{1}
\end{document}